凹 — Chinese character
凹
āo
concave, hollow; depressed; pass, valley
- Pinyin
- āo
- Radical
- 17 ⼐ (Open Box)
- Strokes
- 5
- Components
- 一
- Formation
- ideographic — A rectangle with a hollow
- Japanese
- 凹 as a kanji
Common words with 凹
| Word | Pinyin | Meaning |
|---|---|---|
| 凹陷 | āo xiàn | to cave in; hollow; sunken; depressed |
| 凹凸 | āo tū | concave or convex; bumps and holes |
| 凹槽 | āo cáo | recess; notch |
| 凹凸不平 | āo tū bù píng | (idiom) uneven (surface); bumpy (road) |
| 凹版 | āo bǎn | intaglio printing plate (or a print made with it) |
| 凹痕 | āo hén | dent; indentation |
| 凹坑 | āo kēng | concave depression; crater |
| 凹进 (凹進) | āo jìn | concave; recessed |
| 凹洞 | āo dòng | cavity; pit |
| 凹透镜 (凹透鏡) | āo tòu jìng | concave lens |
| 山凹 | shān āo | col; valley |
| 凹面镜 (凹面鏡) | āo miàn jìng | concave mirror |
English words written with 凹
Data: Make Me a Hanzi (Arphic Public License (graphics.txt); LGPL-3.0-or-later (dictionary.txt)); Unihan Database (Unicode License v3); CC-CEDICT (CC BY-SA 4.0). Retrieved 2026-10-22.